autofillHints property
Maps to UITextContentType / AUTOFILL_HINT_*, which is what makes iOS show the "Passwords" key above the keyboard and lets Android offer a saved credential. Defaults to an existing password (the sign-in case); pass AutofillHints.newPassword on set/change-password fields so the OS offers to generate a strong one instead of filling the old one.
Implementation
final List<String> autofillHints;